6.3.2 Notes when calculating the virtual memory usage
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The value of the area size used by native programs keeps on changing. The value changes in the following cases:
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When you change the trace size of ORB
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When you change the value of area size used by JDBC driver
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When you change the value of area size used by native library of products in use
In such cases, add the memory used for each product to the value of the area size used by native programs. Calculate the memory used for each product as per the documents of the products in use.
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The virtual memory used in the standard configuration of the batch server, might exceed the estimates due to the impact of the software products in use. Add this exceeded value to the value of the virtual memory used. To calculate the increased memory, calculate the memory used for each product as per the documents of the software products.
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In Linux, the system slows down if the memory swap file size is insufficient. We recommend that you specify the real memory size as the upper limit of the virtual memory.